* AwesomeDearBoy: Creator/KanaHanazawa stated that she was happy to be in the cast, as it's [[PlayingAgainstType uncommon]] for her to lend her voice in a serious work.
* {{Defictionalization}}:
** [[http://futuregadget-lab.us/ The Future Gadget Laboratory website]] (written in [[StylisticSuck hilariously]] [[{{Engrish}} bad English]]).
** There were live performances of [[FakeBand FES]][[note]]Sakakibara Yui in FES cosplay[[/note]] starring herself.
** The fans created this: [[http://atchannel.space/ @channel]].
*** There were also a group of fans who created a replica of the Divergence Meter using ''actual'' Nixie tubes.
** There were official sets of ''[[ShowWithinAShow Rai-Net Access Battlers]]'' [[TabletopGame Trading Card Game]] [[http://www.animenewsnetwork.com/news/2011-12-12/steins-gate-in-story-rai-net-game-gets-retail-release being sold]] during [=ComiKet=] 80. Complete with a ([[http://steinsgate.jp/rainet/ downloadable]]) rulebook.
*** You can get an Oopa at a gachapon machine (including the elusive metal version!)
** For a limited time, you could buy a replica model of Okabe's phone.
** To promote Steins;Gate, they have attached a replica of the crashed satellite to the actual Radio Kaikan building in October 2011.
* ParallelPornTitle: ''[[Main/{{Cosplay}} Layers]];Gate'', produced by Total Media Agency, which starred Goro Tameike as Okabe. It was eventually recalled due to [[ScrewedByTheLawyers an angry letter by S;G's devs]].
* TheRedStapler: It is by Steins;Gate's decree that Dr. Pepper be the intellectual drink for the chosen ones. And so it was.
* UnintentionalPeriodPiece: Seeing that the game is set in the year [[TheNewTens 2010]], it had to be this, similar to how ''VisualNovel/ChaosHead'' is to Main/TheNoughties[[note]]2009, to be exact[[/note]]. There are many examples that supports this trope, most prominently the fact that the Phone Trigger system uses Flip phones and E-mails instead of smartphones and Chat applications (which became [[TechnologyMarchesOn the norm of mobile phone communications]] since the mid-2010s). This is why the Phone Trigger system was replaced with the [[BlandNameProduct RINE]] Trigger system[[note]]based on the LINE chat app[[/note]] in the [[VisualNovel/SteinsGateZero sequel]].
* SignificantDoubleCasting: [[spoiler:Amane and Yuki]] share the same voice actresses. Gee, I wonder why that could be?
* RealPlaceBackground: Makise Kurisu's institution in America, Victor Chondria University, is modeled on real world Columbia University. This is seen in depictions of the campus and the university ID card in the manga adaptation of ''Epigraph of the Closed Curve''.
** Many of the locations in the series are based on actual places in Akihabara. Highlights includes ''[=MeyQueen=] [=NyanNyan=]'' which is based on the ''Mai-lish'' maid cafe and The Future Gadget lab itself, which is based on an actual shop, if you go by the address that Okabe mentioned in the beginning of the game. Amusingly, there is an HDTV store in the same location where Braun TV should be.
* WhatCouldHaveBeen:
** There was a plan to include [[spoiler:Moeka]] Ending. It was scrapped for making her too symphatetic.
** In an interview with the game's scriptwriter, there was a plan to incorporate players' own phone for the Phone Trigger system. Players' phone is the phone who answers the mails instead of Okabe's phone. It was turned down due to law and privacy issues (and of course, [[VideoGameCrueltyPotential angry messages from players inscribed in the texts]]).
* XMeetsY: [[https://en.wikipedia.org/wiki/Thrice_Upon_a_Time Thrice Upon a Time]] meets ''Film/GroundhogDay'' and ''Film/{{Primer}}''.
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